I seem to have a leak in my CO2 regulator and am looking for advice. After noticing that my high pressure gauge was at 0 psi the other day, I weighed the CO2 tank to make sure it was empty and then swapped it out. I hooked up the new tank and found the psi was still at 0. The other interesting thing I noticed was that I could now turn my low pressure gauge higher than I previously could. For some reason, I could never get the needle past 25 psi, but now could go as high as the gauge would go. I don't know if that means there was always an issue with the regulator (it's a Chudnow FWIW), but wanted to throw that out there. So, because of all this strangeness, I decided to check for a leak in the regulator. I turned on the CO2 tank, turned off pressure to the kegs, turned up the pressure to about 10 psi and then turned off pressure at the tank. Sure enough, the low pressure gauge was back down to 0 psi after a few hours. I followed the advice here and checked out the diaphragm, but everything looks OK as far as I can tell. I've also sprayed all the connections and gauges and turned on the gas, but didn't see any bubbles. I'm just about ready to toss this regulator and get a new one unless anyone has any other ideas. Is there anything else I can try?